// *** LICENSE HEADER ***
// Filename: ./affector.h
// This file is part of Nodewarz 0.1
// Nodewarz is a 3d OpenGL strategy game
// Copyright (C) 2007 CZestmyr
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
// *** END LICENSE HEADER ***
#ifndef NODEWARS_AFFECTOR_H
#define NODEWARS_AFFECTOR_H

#include "particle.h"
#include <cmath>

class particle;

//virtual class for particle affectors
class affector {
    public:
        virtual ~affector();
        virtual void Modify(particle* toAffect, int dt) = 0;
};

//particle affector that simulates gravity
class gravityAffector: public affector {
    public:
        gravityAffector(float newGravity);
        void Modify(particle* toAffect, int dt);
    private:
        float gravity;
};

//praticle affector that make the particles move in a way a flame does
class flameAffector: public affector {
    public:
        flameAffector(float newCenterX, float newCenterY, float newGravity);
        void Modify(particle* toAffect, int dt);
    private:
        float centerX, centerY, gravity;
};

//particle affector that makes the particles spin around a sphere
class sphereRotationAffector: public affector {
    public:
        sphereRotationAffector(float newCenterX, float newCenterY, float newCenterZ, float newOmega, float newRadius);
        void Modify(particle* toAffect, int dt);
    private:
        float centerX, centerY, centerZ, omega, radius;
        int timestamp;
};

#endif
